Design of a phase array ultrasonic sensor using vibration decoupled concept
Resource
The Journal of the Acoustical Society of America,123(5),3115-3115.
Journal
The Journal of the Acoustical Society of America
Pages
3115
Date Issued
2008-12
Date
2008-12
Author(s)
Lin, CY
Cheng, CC
Wu, WJ
Chen, CS
Shieh, J
Lee, CK
Abstract
Phase array ultrasonic sensors have been used widely to generate higher directional radiating patterns in which piezoelectric units are distributed sparsely in space. In this study, we present a novel design of a phase array ultrasonic sensor based on the concept of vibration decoupling. Decoupling is achieved by careful design of source aperture, and such design allows piezoelectric units tightly located in the same structure. The phase array sensor is designed herein as a cylinder with a dumbbell shape groove to decouple vibration, and finite element analysis is used to optimize the design. Two piezoelectric discs are adhered on the bottom plate of the sensor whereby desirable wave generation and detection are controlled adaptively. By electrical steering, the sensor thus operates as a dipole mode. Finally, prototypes of the sensor are made and experiments are conducted to verify simulation results.
SDGs
Type
journal article